Merge "Don't panic for unhandled product vars" into main am: 8e9ccda5 am:...

Merge "Don't panic for unhandled product vars" into main am: 8e9ccda5 am: 2485bcc6 am: 2e754626

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2755066



Change-Id: I66cb4be10d842d3e599013fdb38ec46a94a89f2b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>